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Mapping the topography of spatial gene expression with interpretable deep learning
Chitra, Uthsav ; Arnold, Brian J ; Sarkar, Hirak ; Ma, Cong ; Lopez-Darwin, Sereno ; Sanno, Kohei ; Raphael, Benjamin J
bioRxiv : the preprint server for biology, 2023-10
United States
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Título:
Mapping the topography of spatial gene expression with interpretable deep learning
Autor:
Chitra, Uthsav
;
Arnold, Brian J
;
Sarkar, Hirak
;
Ma, Cong
;
Lopez-Darwin, Sereno
;
Sanno, Kohei
;
Raphael, Benjamin J
É parte de:
bioRxiv : the preprint server for biology, 2023-10
Descrição:
Spatially resolved transcriptomics technologies provide high-throughput measurements of gene expression in a tissue slice, but the sparsity of this data complicates the analysis of spatial gene expression patterns such as gene expression gradients. We address these issues by deriving a of a tissue slice-analogous to a map of elevation in a landscape-using a novel quantity called the . Contours of constant isodepth enclose spatial domains with distinct cell type composition, while gradients of the isodepth indicate spatial directions of maximum change in gene expression. We develop GASTON, an unsupervised and interpretable deep learning algorithm that simultaneously learns the isodepth, spatial gene expression gradients, and piecewise linear functions of the isodepth that model both continuous gradients and discontinuous spatial variation in the expression of individual genes. We validate GASTON by showing that it accurately identifies spatial domains and marker genes across several biological systems. In SRT data from the brain, GASTON reveals gradients of neuronal differentiation and firing, and in SRT data from a tumor sample, GASTON infers gradients of metabolic activity and epithelial-mesenchymal transition (EMT)-related gene expression in the tumor microenvironment.
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United States
Idioma:
Inglês
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